Drag device for spinning-machines.



G. B. BLACK, Jn. DRAG DEVICE FOR SPINNING MACHINES.

APPLIOATION FILED SEPT. 9, 1910.

Patented May 28, 1912.

COLUMBIA PLANOGRAPN CO-IWASHINQTON, n. c

DRAG DEVICE FOR SPINNING-MACHINES.

Specification of Letters Patent.

Patented May 28, 1912.

Application filed September 9, 1910. Serial No. 581,232.

To all whom it may concern Be it known that I, Gnonen BUCI-IAN BLACK, J r., a. subject of the King of Great Britain and Ireland, residing at Queen Victoria lVorks, Brook street, Dundee, Scotland, have invented new and useful Improvements in Drag Devices for Spinning- Machines, of which the following is a specification.

This invention relates to means for tempering bobbins by means of frictional devices whose resistance varies automatically with the rate of rotation and as the bobbins fill and is applicable to any kind of bobbin or bobbin carrier used in textile work which has to be dragged, directly or indirectly.

lVith many existing bobbins the frictional resistance is applied by means of a weighted or elastic cord to the lower end of the bob bin or to the bobbin carrier. As the bobbin gets filled the resistance has to be increased due to the increasing leverage of the yarn pulling around the bobbin and this is done empirically by the attendant and as a consequence it may often happen that the resistance may cause tension on the yarn greater than the thread can stand or conversely. If this happens the thread will break or otherwise overrun itself and the spindle will have to be stopped to splice the thread. If many breakages occur the loss of production becomes serious.

In my invention the tension on the yarn is always practically constant so that there is little liability for the thread to break and further a finer thread can be spun, or even an inferior quality of fiber can be used to spin the. thread. I11 ordinary. spinning frames there is another resistance besides that due to the friction of the weighted cord and that is the friction between the bobbin and the bobbin board which varies with the weight of the bobbin.

In order that my said invention and the manner of putting the same into practice may be properlyunderstood I have hereunto appended two explanatory sheets of drawings in which the same reference numerals are used to indicate corresponding parts in the figures shown.

Figure 1 shows the frictional device applied to an ordinary rotatory spindle carry-' ing a flier. Fig. 2 shows the device applied to a machine with studs and suspended flier and Fig. 8 shows the device applied to a machine with a non-rotatory traversing and closed or cup fller. Flg. 4 shows a sectional elevation of the frictional device and Fig.

5 shows a plan of same. Figs. 6 and 7 illus trate a modification showing how two opposite lever weight-s can be placed out or in action and two others placed in action. Figs. 8, 9, and 10 illustrate a method of hinging the lever weights to the rotatory carrier and Fig. 11 shows how the levers can be used to give frictional resistance by means of the weight of the bobbin alone.

I11 carrying out my invention I mount on each bobbin stud or spindlewhether fixed or movablea bobbin carrier 2. This carrier consists of a tube fitting on the stud or spindle and at its lower end it terminates in a flange or disk 2. In some cases the flange or disk may be used without the tube. The

bobbin 3 rests on levers 1 on this carrier and the whole is made to rotate together by means of a projection 10 on the carrier engaging with the bobbin.

The first variable resistance is obtained by means of the unbalanced lever or levers 1 set on a radius or a diameter of the bobbin carrier 2 and rotating with it, the unbalanced portion 6 being under the action of centrifugal force, this part of block being capable of sliding against the inside of the cup 5. As each part 6 rotates it will because of centrifugal force bear against the side of the cup 5 according to the rate of rotation of the carrier and the bobbin. As the bobbin rotates at an increasing velocity when it is being filled, so will the centrifugal force, pressure and frictional resistance increase, thus offering an increasing resistance to the pull of the thread where radial leverage is increasing. The second variable resistance is also obtained by means of the lever or levers 1 set on a radius or a diameter of the bobbin carrier 2 and rotating with it. Each lever is in the form of an L and if desired it can be a spring lever with one arm approximately vertical and the other horizontal. The bobbin 3 rests on the ends 4: of the horizontal arms while the vertical arms with the parts 6 bear against the inside of the cup 5 that is the part 6 whose pressure is due to centrifugal action bear on the inside of the cup 5. As the weight of the bobbin increases, so does the resistance. The result of combining these two resistances is to give practically a constant tension on the yarn,

the variation of the tension due to the combined resistance being so small that it is of no practical account. This second resistance 2'. e. that due to the weight of the bobbin not being due to centrifugal force is independent of the rate of rotation of the bobbin and should an end break such resistance will stop the rotation of the bobbin much more quickly than the centrifugal resistance alone,

which resistance decreases as the rate of retation of the bobbin lessens.

Sometimes it is necessary to have a greater or a lesser constant tension on the yarn if the quality be heavier or lighter, the heavier yarns being able to bear the greater tension. lVith heavy yarns this variation of tension can be obtained by increas ing the weight of the part 6 which gives the centrifugal resistance and increasing the leverage which gives the resistance due to the weight of the bobbin and conversely for lighter yarns. It is found in practice that a fairly wide range of sizes of yarns can be dealt with by the same tension that is with one set of resistances. Two sets of resistances will practically cover a full range of ordinary sizes of yarn. This alteration of tension for heavy or light yarns can be obtained by mounting on the bobbin carrier two sets of double resistances as illustrated by Figs. 6 to 10 the one for the heavy and the other for the light yarns, one set being thrown out of gear when the other is in use. The means of putting one set in and the other out of action is as follows see Figs. 6 and 7. In all there are four levers 1, two in opposition for heavy and two for light yarns. These levers are flush with the upper face of the carrier and in the end of each is a vertical screw pin 7 which when partially 'aised as at S (Fig. 6) bears the weight of the bobbin but when screwed down against the carrier flange as at 9 is clear of same, while at the same time it fixes the lever 1 so that it cannot be acted upon by centrifugal action unless desired. Fig. 11 shows levers modified to be acted upon by the weight of the bobbin alone.

The automatic drag as previously described can be used with a flier mounted on a rotatory spindle as in Fig. 1; with a-suspended flier and traversing stud as in Fig. 2 or a closed or cup flier as in Fig. 3.

What I do claim as my invention and desire to secure by Letters Patent is 1. In spinning and twisting machinery the combination of a rotatory bobbin carrier with a non-rotatory cup which can traverse upwardly and downwardly and swinging weighted levers carried by the bobbin carrier which are acted upon by the increasing weight of the bobbin resting on them as such bobbin is being filled, all substantially as set forth.

2. In spinning and twisting machinery, the combination of a rotatory bobbin carrier with a non-rotatory cup which can traverse upwardly and downwardly and swinging weighted levers carried by the bobbin carrier and acted upon by the combined action of centrifugal force due to their unbalanced weights and under the increasing weight of the bobbin resting on them as such bobbin is.

being filled as described.

3. In spinning and twisting machinery the combination of a rotatory bobbin carrier with a non-rotatory cup which can traverse upwardly and downwardly; swinging weighted levers carried by the bobbin carrier and acted upon by the combined action of centrifugal force due to their unbalanced weights'and under the increasing weight of the bobbin resting on them as such bobbin is being filled and a closed or cup flier as de scribed.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GEORGE BUGHAN BLACK, JUNIOR.

\Vitnesses GEORGE CAMEnoN DOUGLAS, AGNES CULBARD DOUGLAS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

- Washington, I). G. 

